diff --git a/src/Network/fgcom.cxx b/src/Network/fgcom.cxx
index f9445ead5..391f06a02 100644
--- a/src/Network/fgcom.cxx
+++ b/src/Network/fgcom.cxx
@@ -231,7 +231,7 @@ void FGCom::postinit()
     app += _version_node->getStringValue();
 
     iaxc_set_callerid( _callsign_node->getStringValue(), app.c_str() );
-    iaxc_set_formats (IAXC_FORMAT_SPEEX, IAXC_FORMAT_SPEEX);
+    iaxc_set_formats (IAXC_FORMAT_SPEEX, IAXC_FORMAT_ULAW|IAXC_FORMAT_SPEEX);
     iaxc_set_speex_settings(1, 5, 0, 1, 0, 3);
     iaxc_set_filters(IAXC_FILTER_AGC | IAXC_FILTER_DENOISE);
     iaxc_set_silence_threshold(-20.0);
diff --git a/utils/fgcom/fgcom.cxx b/utils/fgcom/fgcom.cxx
index f4a630f13..7e3515da7 100644
--- a/utils/fgcom/fgcom.cxx
+++ b/utils/fgcom/fgcom.cxx
@@ -448,7 +448,7 @@ main (int argc, char *argv[])
     callsign = DEFAULT_USER;
 
   iaxc_set_callerid ( callsign, app.c_str() );
-  iaxc_set_formats (IAXC_FORMAT_SPEEX, IAXC_FORMAT_SPEEX);
+  iaxc_set_formats (IAXC_FORMAT_SPEEX, IAXC_FORMAT_ULAW|IAXC_FORMAT_SPEEX);
   iaxc_set_speex_settings(1, 5, 0, 1, 0, 3);
   iaxc_set_filters(IAXC_FILTER_AGC | IAXC_FILTER_DENOISE);
   iaxc_set_silence_threshold(-20.0);